在Java中增加信号量允许

Question

我可以在Java中为信号量添加更多许可吗？

Semaphore s = new Semaphore(3);

在代码中的某处后，我想将许可证更改为4.这可能吗？

Answer 1

是。 release方法（容易混淆地命名为imo）可以用来增加许可证，因为从文档：

There is no requirement that a thread that releases a permit must 
have acquired that permit by calling acquire. 
Correct usage of a semaphore is established by programming convention
in the application. 

换句话说：

semaphore.release(10);

如果线程调用没有获得任何许可，将增加10个许可。